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Give an explanation for the following ob...

Give an explanation for the following observation : The greatest number of oxidation states are exhibited by the members in the middle of a transition series.

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MODERN PUBLICATION-d-AND f- BLOCK ELEMENTS-EXERCISE
  1. How would you account for the following ? Most of the transition metal...

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  2. Why enthalpy of atomisation of the transition elements are quite high ...

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  3. Give an explanation for the following observation : The greatest numbe...

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  4. Give reason, Mn^(2+) ion is more paramagnetic than Fe^(2+) ion.

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  5. Complete the following chemical equation : Cr2O7^(2-) (aq)+ Fe^(2+) (a...

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  6. Complete the following chemical equation : 2CrO4^(2-) + 2H^(+) rarr

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  7. Complete the following chemical equation : MnO4^(-)(aq) + H2O2(aq)+ H^...

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  8. What are interstitial compounds ? Why are such compounds well known fo...

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  9. Write uses of actinoids.

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  10. Write reactions of K2Cr2O7, in acidic medium with Kl

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  11. Write one oxidising reaction of KMnO4 in basic medium.

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  12. What are different oxidation states exhibited by lanthanoids ?

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  13. Draw the structure of chromate ion CrO4^(2-)

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  14. Write the oxidation of H2S by acidified KMnO4.

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  15. Explain magnetic behaviour of transition elements.

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  16. Explain the structure of Cr2O7^(2-)

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  17. Give balanced equations for the reaction between Acidified Potassium d...

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  18. Describe the preparation of potassium permanganate. How does the acidi...

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  19. Transition elements and their compounds are found to be good catalysts...

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  20. What is lanthanoid contraction ?

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